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Date:   Thu, 21 Jul 2022 17:19:01 +0100
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Peter Collingbourne <pcc@google.com>, Will Deacon <will@kernel.org>
Cc:     linux-arm-kernel@lists.infradead.org,
        Marc Zyngier <maz@kernel.org>, stable@vger.kernel.org
Subject: Re: [PATCH] arm64: set UXN on swapper page tables
Message-ID: <Ytl8dbOmTA05t7lA@arm.com>
References: <20220719234909.1398992-1-pcc@google.com>
 <165834388144.420659.7440428405850430601.b4-ty@arm.com>
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On Wed, Jul 20, 2022 at 08:04:48PM +0100, Catalin Marinas wrote:
> On Tue, 19 Jul 2022 16:49:09 -0700, Peter Collingbourne wrote:
> > On a system that implements FEAT_EPAN, read/write access to the idmap
> > is denied because UXN is not set on the swapper PTEs. As a result,
> > idmap_kpti_install_ng_mappings panics the kernel when accessing
> > __idmap_kpti_flag. Fix it by setting UXN on these PTEs.
> 
> Applied to arm64 (for-next/fixes), thanks!
> 
> [1/1] arm64: set UXN on swapper page tables
>       https://git.kernel.org/arm64/c/f7b4c3b82e7d

I'm dropping this patch from for-next/fixes as it breaks linux-next
(interacts badly with stuff already queued). We'll send it to -stable
separately as that's no longer needed in mainline after 5.19.

-- 
Catalin